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Protic Ionic Liquid-Derived Coordination Polymer Glass for Anhydrous Proton Conductor with Moldability
preprintsubmitted on 24.01.2020, 06:57 and posted on 24.01.2020, 11:41 by Tomohiro Ogawa, Kazuki Takahashi, Sanjog S. Nagarkar, Koji Ohara, You-Lee Hong, Yusuke Nishiyama, Satoshi Horike
Herein, we focused on coordination polymer (CP) glass as a hybrid, soft electrolyte to meet these criteria. We applied a protic ionic liquid of which components work also as bridging ligand to construct CP structure with Zn2+ ions. The structural analysis of the CP glass reveals that network formation results in enhancement of the properties of proton conductivity and viscoelasticity. The CP glass features a high anhydrous proton conductivity (σ = 13.3 mS cm−1 at 120 °C) and high transport number of proton (0.94). Fabricated fuel cell with this CP glass membrane exhibits a high open circuit voltage (0.96 V) and a power density (0.15 W cm−2) under dry conditions at 120 °C.